drift-off momentnoun.
The moment in a sales presentation when the potential buyer imagines how much better their life will be if they purchase the product or service.
Example Citation:
"When Mann gives a demo, what he's waiting for is what salespeople call the 'drift-off moment.' The client's eyes get gooey, and they're staring into space. They're not boredthey're imagining what they could do with SurveyBuilder. All tech salespeople mention thisthey've succeeded not when they rivet the client's attention, but when they lose it."
Po Bronson, "Someone's Got to Move Units!," Wired